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Spectrum Analyzers

YSA-P400 Spectrum Analyzer

40 GHz Handheld Real-Time Spectrum Analyzer

The YSA-P400 combines 9 kHz to 40 GHz coverage, 100 MHz real-time analysis and an integrated touchscreen in a 1.5 kg handheld instrument.

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YSA-P400 Spectrum Analyzer
Frequency range
9 kHz to 40 GHz
Real-time bandwidth
100 MHz
Weight
1.5 kg
Phase noise
−107.5 dBc/Hz
At 1 GHz, 10 kHz offset

Overview

YSA-P400 brings real-time spectrum analysis to field RF work, with 9 kHz to 40 GHz coverage, 100 MHz analysis bandwidth and a 10.1-inch IPS multi-touch display.

Fixed-LO I/Q capture, transient and burst analysis, and record/playback tools support interference hunting, radar testing, 5G maintenance and EMC pre-compliance measurements.

  1. Real-Time Spectrum Analysis

    100 MHz real-time bandwidth with transient and burst analysis

  2. IQ Streaming

    Raw I/Q data capture for post-processing

  3. Digital Demodulation

    Support for ASK, FSK, PSK, GMSK, and QAM with constellation and eye-diagram views

  4. Phase Noise Measurement

    -107.5 dBc/Hz @ 1GHz (10 kHz offset). One-button automated measurement with high-precision SSB display

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Additional product details

Laboratory Performance in the Palm of Your Hand

The YSA-P400 series combines handheld field portability with laboratory-oriented spectrum analysis specifications. It covers 9 kHz up to 40 GHz with a Displayed Average Noise Level (DANL) of -161 dBm/Hz and phase noise performance of -107.5 dBc/Hz at 1 GHz (10 kHz offset).

The YSA-P400 features a fully integrated Real-Time Spectrum Analyzer (RTSA) architecture with 100 MHz bandwidth, fixed-LO IQ capture, transient and burst analysis, spectrum probability density, real-time spectrogram, and record/playback tools. This makes it suitable for 5G network maintenance, radar testing, interference hunting, and wireless monitoring workflows.

Why Handheld?

Traditional benchtop spectrum analyzers deliver excellent performance but are often heavy and bulky, limiting their field deployment capabilities. The YSA-P400 changes the equation:

  • Only 1.5 kg - carry it to any site, any rooftop, any mast
  • 3 hours of battery life - no mains power required
  • External power bank supported - extend operation in the field
  • 10.1-inch IPS multi-touch display - intuitive gesture control, no external monitor needed
  • 40 GHz coverage - supports field RF analysis up to 40 GHz
  • -161 dBm/Hz DANL - laboratory-grade sensitivity in a portable form factor

YSA-P400 Active Directional Antenna Accessories

Pair the YSA-P400 with the XDA-1000 / XDA-2000 active directional antennas for directional signal search, interference hunting, field-strength workflows, and attitude-aware GNSS mapping from 500 MHz to 10 GHz or 20 GHz.

Key Capabilities & Applications

Transient and burst analysis

Inspect intermittent signals with 100 MHz real-time bandwidth, spectrum probability density, a real-time spectrogram and record/playback tools.

Digital signal analysis

Capture raw I/Q data for post-processing. Digital demodulation supports ASK, FSK, PSK, GMSK and QAM with constellation and eye-diagram views.

Field and remote workflows

Use the integrated display and three-hour battery for portable measurements, or connect to a host through USB interfaces and Ethernet via a USB hub.

All capabilities and operating conditions

DANL

-161 dBm/Hz at 1GHz

Real-time

100 MHz analysis bandwidth with transient and burst analysis

Display

10.1" multi-touch touchscreen

Integration

USB data interfaces and USB-to-serial connection

Connectivity

USB 3.0 (Type-C), USB 2.0 (Type-C & Type-A), Micro HDMI

Common applications

  • 5G Network Maintenance
  • RF Interference Hunting & Spectrum Monitoring
  • Radar Testing
  • EMC Pre-compliance Testing
  • Wireless Monitoring
  • Scientific Research & Education

Technical Specifications

ParameterSpecification
Frequency9 kHz to 40 GHz
Real-time BW100 MHz
Phase Noise-107.5 dBc/Hz @ 1 GHz (10 kHz offset)
Amplitude Accuracy± 2.0 dB at 9 kHz to 9.5 GHz; ± 3.0 dB at 9.5 GHz to 40 GHz
Maximum Input Power (CW)+20 dBm at 90 MHz to 40 GHz with preamp off; +8 dBm at 9 kHz to 90 MHz or with preamp on
RF Input2.4 mm male, 50 Ω
Battery Life3 hours
Display10.1-inch IPS multi-touch
View all 38 specifications
ParameterSpecification
DANL-161 dBm/Hz
Weight1.5 kg
Reference ClockInternal or external
Frequency AccuracyOCXO (standard), < 1 ppm
Aging and Temperature StabilityOCXO (standard), < 1 ppm/year
SSB Phase Noise at 1 GHz1 kHz: -99; 10 kHz: -107.5; 100 kHz: -107.7; 1 MHz: -122.7 dBc/Hz
SSB Phase Noise at 40 GHz1 kHz: -78.4; 10 kHz: -85.7; 100 kHz: -85.1; 1 MHz: -100.8 dBc/Hz
Image Rejection> 90 dBc (9 kHz to 3 GHz); > 58 dBc (3 GHz to 9.5 GHz), typical
LO Related Spurious< -65 dBc
Maximum DC Voltage± 10 VDC
Display RangeDANL to 20 dBm, typical
IF In-Band Flatness± 2.0 dB
Reference Level-50 dBm to 20 dBm, typical
RF PreamplifiersAutomatic or forcibly turn off
VSWR< 2.0:1 at 90 MHz to 16 GHz; < 3.0:1 at 16 GHz to 40 GHz
DANL by Band9 kHz: -134 / -145; 100 kHz to 88 MHz: -151 / -157; 88 MHz to 9.0 GHz: -148 / -154; 9.0 to 19 GHz: -153 / -158; 19 to 40 GHz: -146 / -147 dBm/HzRBW = 10 kHz; paired values at reference levels -20 / -50 dBm
IIP3 / IIP2 at 1 GHz40.3 / 75.5 dBm at reference 20 dBm; 27.4 / 45.3 dBm at reference 0 dBm; 8.7 / 25.2 dBm at reference -20 dBm
IIP3 / IIP2 at 40 GHz31.7 / 88.6 dBm at reference 20 dBm; 10.3 / 86.1 dBm at reference 0 dBm; 4.8 / 66.6 dBm at reference -20 dBm
Power SupplyUSB PD, 20 V
Reference InputMMCX female, ≥ 1.5 Vpp, approximately 300 Ω
Reference OutputIntegrated in MUXIO, 3.3 V CMOS, programmable on/off
External Trigger Input / OutputIntegrated in MUXIO, 3.3 V CMOS; input high impedance
Analog IF OutputMMCX female; maximum -25 dBm, 50 Ω, 307.2 MHz ± 50 MHz
Storage16 GB EMMC
Power Consumption25 W, typical
Dimensions260 × 179 × 46 mm
GNSS SynchronizationInternal GNSS, ± 100 ns
Operating Temperature0 to 50 °C, ambient
Storage Temperature-20 to 70 °C, ambient
Included AccessoriesProtective shell, power adapter, power cable, calibration certificate

Specifications are subject to change without notice.

Models, Configuration & Compatibility

YSA-P400

Included with YSA-P400

Protective shell, power adapter, power cable and calibration certificate.

Compatible directional antennas

XDA-1000 covers 500 MHz to 10 GHz; XDA-2000 covers 500 MHz to 20 GHz. Select the antenna for the required signal range.

USB control and data

USB 3.0 Type-C and USB 2.0 Type-C / Type-A interfaces, USB-to-serial connection, and USB Ethernet hub support for remote PC control.

Control interfaces and software

YSA-P400 data interfaces include USB 3.0 Type-C, USB 2.0 Type-C, and USB 2.0 Type-A, with USB-to-serial connection and driver-free USB hub support for Ethernet-based remote PC control.

USB 3.0 Type-C · USB 2.0 Type-C · USB 2.0 Type-A · USB-to-Serial Connection · USB Ethernet Hub Support

Technical Resources

Download Datasheet

PDF technical specifications

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Selection guidance

Format: Handheld

Coverage: 9 kHz to 40 GHz; 100 MHz real-time bandwidth

Best for: Field interference hunting, EMC pre-compliance, 5G maintenance, radar work, and measurements that need an integrated display and battery.

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